Device simulation of all-perovskite four-terminal tandem solar cells: towards 33% efficiency

Inorganic–organic hybrid perovskites offer wide optical absorption, long charge carrier diffusion length, and high optical-to-electrical conversion, enabling more than 25% efficiency of single-junction perovskite solar cells. All-perovskite four-terminal (4T) tandem solar cells have gained great att...

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Autores principales:	Singh Ajay, Gagliardi Alessio
Formato:	article
Lenguaje:	EN
Publicado:	EDP Sciences 2021
Materias:	perovskite solar cell four-terminal tandem drift-diffusion doping trap-assisted recombination surface modification contact workfunction Renewable energy sources TJ807-830
Acceso en línea:	https://doaj.org/article/f72a143b79a945f6a21735a3b160be77
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spelling	oai:doaj.org-article:f72a143b79a945f6a21735a3b160be772021-11-08T15:20:11ZDevice simulation of all-perovskite four-terminal tandem solar cells: towards 33% efficiency2105-071610.1051/epjpv/2021004https://doaj.org/article/f72a143b79a945f6a21735a3b160be772021-01-01T00:00:00Zhttps://www.epj-pv.org/articles/epjpv/full_html/2021/01/pv210022/pv210022.htmlhttps://doaj.org/toc/2105-0716Inorganic–organic hybrid perovskites offer wide optical absorption, long charge carrier diffusion length, and high optical-to-electrical conversion, enabling more than 25% efficiency of single-junction perovskite solar cells. All-perovskite four-terminal (4T) tandem solar cells have gained great attention because of solution-processability and potentially high efficiency without a need for current-matching between subcells. To make the best use of a tandem architecture, the subcell bandgaps and thicknesses must be optimized. This study presents a drift-diffusion simulation model to find optimum device parameters for a 4T tandem cell exceeding 33% of efficiency. Optimized subcell bandgaps and thicknesses, contact workfunctions, charge transport layer doping and perovskite surface modification are investigated for all-perovskite 4T tandem solar cells. Also, using real material and device parameters, the impact of bulk and interface traps is investigated. It is observed that, despite high recombination losses, the 4T device can achieve very high efficiencies for a broad range of bandgap combinations. We obtained the best efficiency for top and bottom cell bandgaps close to 1.55 eV and 0.9 eV, respectively. The optimum thickness of the top and bottom cells are found to be about 250 nm and 450 nm, respectively. Furthermore, we investigated that doping in the hole transport layers in both the subcells can significantly improve tandem cell efficiency. The present study will provide the experimentalists an optimum device with optimized bandgaps, thicknesses, contact workfunctions, perovskite surface modification and doping in subcells, enabling high-efficiency all-perovskite 4T tandem solar cells.Singh AjayGagliardi AlessioEDP Sciencesarticleperovskite solar cellfour-terminal tandemdrift-diffusiondopingtrap-assisted recombinationsurface modificationcontact workfunctionRenewable energy sourcesTJ807-830ENEPJ Photovoltaics, Vol 12, p 4 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	perovskite solar cell four-terminal tandem drift-diffusion doping trap-assisted recombination surface modification contact workfunction Renewable energy sources TJ807-830
spellingShingle	perovskite solar cell four-terminal tandem drift-diffusion doping trap-assisted recombination surface modification contact workfunction Renewable energy sources TJ807-830 Singh Ajay Gagliardi Alessio Device simulation of all-perovskite four-terminal tandem solar cells: towards 33% efficiency
description	Inorganic–organic hybrid perovskites offer wide optical absorption, long charge carrier diffusion length, and high optical-to-electrical conversion, enabling more than 25% efficiency of single-junction perovskite solar cells. All-perovskite four-terminal (4T) tandem solar cells have gained great attention because of solution-processability and potentially high efficiency without a need for current-matching between subcells. To make the best use of a tandem architecture, the subcell bandgaps and thicknesses must be optimized. This study presents a drift-diffusion simulation model to find optimum device parameters for a 4T tandem cell exceeding 33% of efficiency. Optimized subcell bandgaps and thicknesses, contact workfunctions, charge transport layer doping and perovskite surface modification are investigated for all-perovskite 4T tandem solar cells. Also, using real material and device parameters, the impact of bulk and interface traps is investigated. It is observed that, despite high recombination losses, the 4T device can achieve very high efficiencies for a broad range of bandgap combinations. We obtained the best efficiency for top and bottom cell bandgaps close to 1.55 eV and 0.9 eV, respectively. The optimum thickness of the top and bottom cells are found to be about 250 nm and 450 nm, respectively. Furthermore, we investigated that doping in the hole transport layers in both the subcells can significantly improve tandem cell efficiency. The present study will provide the experimentalists an optimum device with optimized bandgaps, thicknesses, contact workfunctions, perovskite surface modification and doping in subcells, enabling high-efficiency all-perovskite 4T tandem solar cells.
format	article
author	Singh Ajay Gagliardi Alessio
author_facet	Singh Ajay Gagliardi Alessio
author_sort	Singh Ajay
title	Device simulation of all-perovskite four-terminal tandem solar cells: towards 33% efficiency
title_short	Device simulation of all-perovskite four-terminal tandem solar cells: towards 33% efficiency
title_full	Device simulation of all-perovskite four-terminal tandem solar cells: towards 33% efficiency
title_fullStr	Device simulation of all-perovskite four-terminal tandem solar cells: towards 33% efficiency
title_full_unstemmed	Device simulation of all-perovskite four-terminal tandem solar cells: towards 33% efficiency
title_sort	device simulation of all-perovskite four-terminal tandem solar cells: towards 33% efficiency
publisher	EDP Sciences
publishDate	2021
url	https://doaj.org/article/f72a143b79a945f6a21735a3b160be77
work_keys_str_mv	AT singhajay devicesimulationofallperovskitefourterminaltandemsolarcellstowards33efficiency AT gagliardialessio devicesimulationofallperovskitefourterminaltandemsolarcellstowards33efficiency
_version_	1718441910132015104

Device simulation of all-perovskite four-terminal tandem solar cells: towards 33% efficiency

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